Air hammer



FIG. 1 is a top, right front perspective view of an air hammer of the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an air hammer, as shown and described. 